问题 多项选择题

下列属于电气防爆基本措施的是()。

A.严格控制电气设备的温度

B.采用防爆的电气设备

C.设置漏电火灾报警和紧急断电装置

D.安全使用防爆电气设备

E.宜将正常运行时产生火花、电弧和危险温度的电气设备和线路,布置在爆炸危险性较小或没有爆炸危险的环境内

答案

参考答案:B, C, D, E

解析:电气防爆基本措施:①宜将正常运行时产生火花、电弧和危险温度的电气设备和线路,布置在爆炸危险性较小或没有爆炸危险的环境内;②采用防爆的电气设备;③按有关电力设备接地设计技术规程规定的一般情况不需要接地的部分,在爆炸危险区域内仍应接地,电气设备的金属外壳应可靠接地;④设置漏电火灾报警和紧急断电装置;⑤安全使用防爆电气设备;⑥散发较空气重的可燃气体、可燃蒸汽的甲类厂房以及有粉尘、纤维爆炸危险的乙类厂房,采用不发火花的地面。

判断题
阅读理解

The area of child psychology is one of the most significant and well studied of all the branches of psychology. It aims to help with achieving a greater understanding of the behavior of children through an understanding of their minds. It deals with children who range from the prenatal(出生前的)stage right up to the stage of adolescence.

The psychologist Jean Piaget (1896-1980) has been credited with making a major breakthrough in this area when he put forward his idea that children were not actually less intelligent than adults, rather they just thought in a different way. Preciously the development of children right from birth through to adulthood was an area that was almost completely neglected. In fact very little work was done in this area. However, interest in this field has now developed to the point of being one of the most debated of all the areas of psychology.

Despite popular belief that factors such as genetics or personal characteristics are the only determining factors that influence a youth’s behavior, this is not in fact the case. In reality, development actually includes many more factors than those contained within an individual. Factors such as environment, which can include social relationships and the surrounding culture, also play important roles. Relationships with both peers and adults will no doubt affect how children think and learn, and therefore develop. These relationships can include those that are found not only within families but also in schools and peer groups.

Culturally speaking, this factor will contribute greatly to how children develop their personality concerning the values they end up holding (perhaps for a lifetime) as well as how they view such things as traditions and customs.

Nowadays, psychologists have agreed that a child’s psychology is both unique and highly complex. However, there are debates on many different points in this field and many viewpoints exist.

小题1:The word “neglected” underlined in Paragraph 2 can be replaced by “______”.

A.ignored

B.destroyed

C.developed

D.explored小题2:What does the third paragraph mainly tell us?

A.Popular belief about child psychology.

B.The role families play in a child’s development.

C.Factors that affect a child’s development.

D.The importance of relationships to a child.小题3:The author’s purpose in writing the passage is to ____.

A.introduce an important psychologist.

B.give a brief introduction to child psychology.

C.compare some of the areas of psychology.

D.explain the development in psychology.